CN112037974B - Composite material reinforced insulated wire and manufacturing method thereof - Google Patents
Composite material reinforced insulated wire and manufacturing method thereof Download PDFInfo
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- CN112037974B CN112037974B CN202010921999.9A CN202010921999A CN112037974B CN 112037974 B CN112037974 B CN 112037974B CN 202010921999 A CN202010921999 A CN 202010921999A CN 112037974 B CN112037974 B CN 112037974B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
Abstract
The invention belongs to the technical field of insulated wires, and particularly relates to a composite material reinforced insulated wire and a manufacturing method thereof. According to the invention, the reinforcing strips are uniformly distributed at intervals between the conductor shielding layer and the insulating layer, so that the insulating lead achieves the effect of structure reinforcement, and during manufacturing, the reinforcing strips synchronously enter between the extruded conductor shielding layer and the insulating layer, and the curing is completed. The invention has the advantages of large ratio of self breaking force to self weight of the insulated wire, high allowable bending limit, no increase of the outer diameter and relatively low manufacturing cost, further has low risk of easy breakage and low risk, does not need to use expensive special splicing and strain fitting, and has simple, convenient, flexible and effective manufacturing method of the insulated wire.
Description
Technical Field
The invention belongs to the technical field of insulated wires, and particularly relates to a composite material reinforced insulated wire and a manufacturing method thereof.
Background
The insulated wire is used for a medium and low voltage distribution network, and the structure of the insulated wire mainly comprises a conductor, a shielding layer and an insulating layer from inside to outside in the prior art, but the insulated wire has the defects of small ratio of breaking force to dead weight and low elastic modulus, so that the problems of small span, poor sag characteristic, poor safety characteristic and the like of a distribution line are caused.
Therefore, a reinforced insulated wire with a steel strand added in the center of a conductor has been developed, but the outer diameter and the self weight of the insulated wire are greatly increased while the breaking force is increased, so that the safety characteristic and the sag characteristic of a distribution line are not greatly improved.
Furthermore, the steel strand is replaced by a rod-shaped carbon fiber composite core rod, so that a high ratio of the breaking force to the self weight can be achieved, the rod-shaped carbon fiber has high strength, light weight, small linear expansion coefficient and high temperature resistance, but the whole manufacturing cost is high, the breakage is easy, the outer diameter and the weight of the insulated wire are increased, and the large-scale popularization and application cannot be achieved.
Patent publication numbers CN203456147U, CN202487246U, and CN203260394U disclose overhead insulated wire structures: the composite material reinforced core, the conductor, the inner screen insulating layer, the insulating layer and the wear-resistant weather-resistant outer screen sheath layer are arranged from inside to outside; the reinforcing core is a rod made of a centrally located resin-based carbon fiber and a reinforced composite material surrounding the carbon fiber.
But the built on stilts insulated wire in this type of utility model patent all deposits the enhancement core cost of manufacture expensive, and increases the external diameter of insulated wire and insulating material's weight by a wide margin, and the price/performance ratio is lower and influence the problem of use.
Disclosure of Invention
The invention aims to provide a composite material reinforced insulated wire and a manufacturing method thereof, which can enable the insulated wire to achieve the effect of structure reinforcement by arranging reinforcing strips uniformly distributed at intervals between a shielding layer and an insulating layer, and enable the reinforcing strips in the form of prepreg to synchronously enter between the extruded shielding layer and the insulating layer and finish curing during manufacturing. The invention has the advantages of large ratio of self breaking force to self weight of the insulated wire, high allowable bending limit, no increase of the outer diameter and relatively low manufacturing cost, further has low risk of easy breakage and low risk, does not need to use expensive special splicing and strain fitting, and has simple, convenient, flexible and effective manufacturing method of the insulated wire.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a composite material reinforced insulated wire, includes from inside to outside conductor, shielding layer, and insulating layer, still includes evenly spaced set up the conductor shielding layer with reinforcing strip between the insulating layer.
In the invention, the reinforcing strip can be semiconductive or insulating, while the thinner semiconductive reinforcing strip can replace part of the space of the conductor shielding layer, and the thinner insulating reinforcing strip can replace part of the space of the insulating layer, so that the outer diameter and the self weight of the insulated wire can not be increased.
In addition, the thinner reinforcing strip replaces a thicker middle core type reinforcing rod, so that the insulating wire has the advantages of high strength, good bending property and basically no increase of the outer diameter and the self weight of the insulating wire.
The further preferred technical scheme is as follows: the reinforcing tape includes reinforcing fibers, and a resin disposed on the reinforcing fibers.
In the present invention, the resin may be impregnated into the reinforcing fibers to form a reinforcing tape in the form of a prepreg.
The further preferred technical scheme is as follows: the temperature resistance grade of the resin is higher than that of the insulating layer.
The further preferred technical scheme is as follows: and grooves for arranging the reinforcing strip are arranged on opposite annular surfaces of the conductor shielding layer and/or the insulating layer.
In the invention, the groove can be only arranged on the outer annular surface of the shielding layer, can also be only arranged on the inner annular surface of the insulating layer, and can also be provided with parts on the two annular surfaces, so that firstly, the reinforced strip is ensured to be stably installed and fixed, the position movement is not easy to occur, secondly, the diameter of the insulated wire is ensured not to be increased, and the use environment and the use requirement of the existing common insulated wire are ensured not to be changed.
In addition, the conductor shielding layer is semi-conductive, the thickness of the thinnest point of the conductor shielding layer is not checked, the space of the conductor shielding layer is replaced by the thin semi-conductive reinforcing strip, the outer diameter of the insulated wire cannot be increased, and the thickness of the thinnest point of the insulating layer is checked, so that the outer diameter and the self weight of the insulated wire cannot be increased by the thin insulating reinforcing strip.
Also, the conductor shield layer and the insulation layer are both in a molten state during extrusion, the grooves are naturally formed by pressing of a reinforcing tape in a prepreg form, the groove forming operation can be selectively performed on the conductor shield layer and the insulation layer by the guiding of the tape, and preferably, most of the groove depth is provided on the conductor shield layer, and only the indentation with a shallow depth is provided on the insulation layer.
The further preferred technical scheme is as follows: the reinforced fiber is any one or mixture of a plurality of carbon fibers, glass fibers, aramid fibers and basalt fibers; the resin is thermosetting or thermoplastic resin, and the conductive performance is insulating or semiconductive.
In the present invention, the glass fiber and the aramid fiber are insulating, the carbon fiber is conductive, and the resin may be insulating or semiconductive.
The further preferred technical scheme is as follows: and an insulating shielding layer is arranged on the outer side of the insulating layer.
The further preferred technical scheme is as follows: the reinforcing tape may also be disposed between the insulating layer and the insulating shield layer.
In the present invention, the insulation shield layer is semiconductive, and may still be an insulation reinforcing tape or a semiconductive reinforcing tape when the reinforcing tape is located between the insulation layer and the insulation shield layer, the insulation reinforcing tape is used to increase the structural strength of the wire when the reinforcing tape mainly forms the groove on the insulation layer, and the semiconductive reinforcing tape, i.e., a semiconductive carbon fiber composite reinforcing tape, is used when the reinforcing tape mainly forms the groove on the insulation shield layer.
A manufacturing method of a composite material reinforced insulated wire is characterized by sequentially comprising the following steps:
s1, enabling the reinforcing fibers to enter and exit the resin, and then carrying out online manufacturing through an impregnation forming die to obtain the reinforcing fibers in the prepreg form; the conductor passes through a first plastic extruding machine head to obtain a conductor wrapped by a shielding layer;
s2, synchronously passing the conductor wrapped by the shielding layer and the reinforcing fibers in the prepreg form through a second extruder head to obtain an insulated wire precursor wrapped by at least an insulating layer;
s3, the insulated conductor precursor is wound into a disc through a cooling water tank to obtain an insulated conductor product including the reinforced strip material or an uncured insulated conductor semi-finished product;
and S4, finishing the cross-linking and curing operation of the semi-finished insulated conducting wire in a steam room or a warm water pool to form the insulated conducting wire product.
The further preferred technical scheme is as follows: and the reinforcing fibers in the prepreg form are cured and formed when extruded by the second extruder head, or are crosslinked and cured and formed in the steam room or the warm water pool.
The further preferred technical scheme is as follows: and a traction device and a winding and coiling device are also arranged behind the cooling water tank.
According to the invention, the reinforcing strips which are uniformly distributed at intervals are arranged between the shielding layer and the insulating layer, so that the insulating lead achieves the effect of structure reinforcement, and in the manufacturing process, the reinforcing strips in the form of prepreg are synchronously fed between the extruded shielding layer and the extruded insulating layer, and the curing is completed. The invention has the advantages of large ratio of self breaking force to self weight of the insulated wire, high allowable bending limit, no increase of the outer diameter and relatively low manufacturing cost, further has low risk of easy breakage and low risk, does not need to use expensive special splicing and strain fitting, and has simple, convenient, flexible and effective manufacturing method of the insulated wire.
Drawings
Fig. 1 is a schematic structural view of an insulated wire according to the present invention.
FIG. 2 is a flow chart of a method of making an insulated conductor according to the present invention.
Detailed Description
The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1 and fig. 2, a composite material reinforced insulated wire, specifically a 1-10kV carbon fiber composite material reinforced overhead insulated wire, includes a conductor 1 from inside to outside, a semi-conductive conductor shielding layer 2, and an insulating layer 4, and further includes reinforcing strips 3 uniformly spaced between the conductor shielding layer 2 and the insulating layer 4.
In the present embodiment, the number and size of the reinforcing strips 3 are selected and determined according to the actual specification of the conductor.
The reinforcing tape 3 includes reinforcing fibers, and an impregnating resin disposed on the reinforcing fibers and cured by heat for compounding the reinforcing fibers and increasing toughness and strength of the wire. The temperature resistance level of the resin is higher than that of the insulating layer 4.
The opposite annular faces of the conductor shield 2 are provided with naturally shaped grooves and the inner side of the insulating layer 4 is slightly indented. The reinforcing fibers are semiconductive T700-12k carbon fibers; the impregnating resin is a fast curing high temperature resistant epoxy resin.
The outer side of the insulating layer 4 can be further provided with an insulating shielding layer 5, and the conductor shielding layer 2, the insulating layer 4 and the insulating shielding layer 5 can be manufactured in a layered synchronous extrusion mode.
In this embodiment, the conductor 1 is a hard aluminum stranded compressed conductor, and the material of the conductor shielding layer 2, the insulating layer 4 and the insulating shielding layer 5 is an overhead insulated conductor commonly used in the prior art.
A manufacturing method of a composite material reinforced insulated wire sequentially comprises the following steps:
s1, enabling the reinforcing fibers to enter and exit the resin, and then carrying out online manufacturing through the impregnation forming die 6 to obtain the reinforcing fibers in the prepreg form; the conductor 1 passes through a first extruder head 7 to obtain the conductor 1 wrapped by the conductor shielding layer 2;
s2, enabling the conductor 1 wrapped by the conductor shielding layer 2 and the reinforcing fibers in the prepreg form to synchronously pass through a second extruder head 8, and obtaining an overhead insulated conductor precursor wrapped by the insulation shielding layer 5 and the insulation layer 4;
s3, the insulated conductor precursor passes through a cooling water tank 9 and is wound into a disc to obtain an insulated conductor product 10 containing the reinforcing strip 3 or an uncured insulated conductor semi-finished product;
and S4, finishing the cross-linking and curing operation of the semi-finished insulated conducting wire in a steam room or a warm water pool to form the insulated conducting wire product 10.
The reinforcing fibers in the prepreg form are cured and formed when being extruded by the second extruder head 8, or are crosslinked and cured and formed in the steam room or the warm water pool.
And a traction device 11 and a winding and coiling device are also arranged behind the cooling water tank 9.
In this embodiment, the manner of impregnating the carbon fiber with the epoxy resin is implemented according to an impregnation method commonly used in the prior art, the extruding machine, the cooling water tank 9, the traction device 11 and the winding and coiling device are all existing devices, and the insulation shielding layer 5 may be optionally not provided according to the voltage level in the use condition.
Finally, the overhead insulated conductor obtained in the embodiment has relatively large and sufficient balanced overall performance after the reinforcing strip 3 passing through the circle of the relatively outer side is inserted and fixed, and relatively low manufacturing cost, and the overhead insulated conductor conforms to the concept of value engineering and has relatively high popularization value.
Example 2
Partially shown in fig. 1 and 2, the composite material reinforced insulated wire, specifically the 1-10kV carbon fiber composite material reinforced overhead insulated wire, comprises a conductor 1, a semi-conductive conductor shielding layer 2, an insulating layer 4, an insulating shielding layer 5 and reinforcing strips 3 uniformly arranged between the insulating layer 4 and the insulating shielding layer 5 at intervals from inside to outside.
In the present embodiment, the number and size of the reinforcing strips 3 are selected and determined according to the actual specification and size of the conductor, and compared to embodiment 1, the reinforcing strips 3 in the present embodiment may be provided in a larger number because the circumference at the installation position is larger.
The reinforcing tape 3 includes reinforcing fibers, and an impregnating resin disposed on the reinforcing fibers and cured by heat for compounding the reinforcing fibers and increasing toughness and strength of the wire. The temperature resistance level of the resin is higher than that of the insulating layer 4.
The opposite annular faces of the insulating shield 5 have naturally shaped grooves and the inside of the insulating layer 4 has slight indentations. The reinforcing fibers are semiconductive T700-12k carbon fibers; the impregnating resin is a fast curing high temperature resistant epoxy resin.
The conductor shielding layer 2, the insulating layer 4 and the insulating shielding layer 5 can be manufactured in a layered synchronous extrusion mode.
In this embodiment, the conductor 1 is a hard aluminum stranded compressed conductor, and the material of the conductor shielding layer 2, the insulating layer 4 and the insulating shielding layer 5 is an overhead insulated conductor commonly used in the prior art.
A manufacturing method of a composite material reinforced insulated wire sequentially comprises the following steps:
s1, enabling the reinforcing fibers to enter and exit the resin, and then carrying out online manufacturing through the impregnation forming die 6 to obtain the reinforcing fibers in the prepreg form; the conductor 1 passes through a first extruder head 7 to obtain the conductor 1 wrapped by the conductor shielding layer 2;
s2, synchronously passing the conductor 1 and the insulating layer 4 wrapped by the conductor shielding layer 2 and the reinforcing fibers in the prepreg form through a second extruder head 8 to obtain the overhead insulated conductor precursor wrapped by the insulating shielding layer 5 and the insulating layer 4;
s3, the insulated conductor precursor passes through a cooling water tank 9 and is wound into a disc to obtain an insulated conductor product 10 containing the reinforcing strip 3 or an uncured insulated conductor semi-finished product;
and S4, finishing the cross-linking and curing operation of the semi-finished insulated conducting wire in a steam room or a warm water pool to form the insulated conducting wire product 10.
The reinforcing fibers in the prepreg form are cured and formed when being extruded by the second extruder head 8, or are crosslinked and cured and formed in the steam room or the warm water pool.
And a traction device 11 and a winding and coiling device are also arranged behind the cooling water tank 9.
In this embodiment, the manner of impregnating the carbon fibers with the epoxy resin is implemented according to an impregnation method commonly used in the prior art, and the extruding machine, the cooling water tank 9, the traction device 11 and the winding and coiling device are all existing equipment.
Finally, the overhead insulated conductor obtained in the embodiment has relatively large and sufficient balanced overall performance after the reinforcing strip 3 which is one circle more relatively to the outer side than the reinforcing strip 3 obtained in the embodiment 1 is inserted and fixed, and relatively low manufacturing cost, and the overhead insulated conductor conforms to the concept of value engineering and has relatively high popularization value.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.
Claims (6)
1. A composite-reinforced insulated wire comprising, from the inside to the outside, a conductor (1), a conductor shield (2), and an insulating layer (4), characterized in that: the reinforcing strips (3) are uniformly arranged between the conductor shielding layer (2) and the insulating layer (4) at intervals;
the reinforcing tape (3) comprises reinforcing fibers, and a resin disposed on the reinforcing fibers;
a groove for arranging the reinforcing strip (3) is formed in the outer annular surface of the conductor shielding layer (2);
the reinforced fiber is any one or mixture of a plurality of carbon fibers, glass fibers, aramid fibers and basalt fibers; the resin is thermosetting or thermoplastic resin, and the conductive performance is semi-conductive;
the manufacturing method of the insulated wire sequentially comprises the following steps:
s1, enabling the reinforcing fibers to enter and exit the resin, and then carrying out online manufacturing through an impregnation forming die (6) to obtain the reinforcing fibers in the prepreg form; the conductor (1) passes through a first extruder head (7) to obtain the conductor (1) wrapped by the conductor shielding layer (2);
s2, synchronously passing the conductor (1) wrapped by the shielding layer (2) and the reinforcing fibers in the prepreg form through a second extruder head (8) to obtain an insulated wire precursor wrapped by at least an insulating layer (4);
s3, the insulated conductor precursor passes through a cooling water tank (9) and is wound into a disc to obtain an insulated conductor product (10) including the reinforcing strip material (3) or an uncured insulated conductor semi-finished product;
and S4, finishing the cross-linking and curing operation of the semi-finished insulated conducting wire in a steam room or a warm water pool to form the insulated conducting wire product.
2. The composite-reinforced insulated conductor of claim 1, wherein: the temperature resistance grade of the resin is higher than that of the insulating layer (4).
3. The composite-reinforced insulated conductor of claim 1, wherein: and an insulating shielding layer (5) is arranged on the outer side of the insulating layer (4).
4. A composite reinforced insulated conductor according to claim 3, wherein: the reinforcing strip (3) can also be arranged between the insulating layer (4) and the insulating shield (5).
5. The composite-reinforced insulated conductor of claim 1, wherein: the reinforcing fibers in the prepreg form are cured and formed when extruded by the second extruder head (8) or are crosslinked and cured and formed in the steam room or the warm water pool.
6. The composite-reinforced insulated conductor of claim 1, wherein: and a traction device (11) and a winding and coiling device are also arranged behind the cooling water tank (9).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921999.9A CN112037974B (en) | 2020-09-04 | 2020-09-04 | Composite material reinforced insulated wire and manufacturing method thereof |
| PCT/CN2020/130285 WO2022048035A1 (en) | 2020-09-04 | 2020-11-20 | Composite material enhanced insulated conductor and manufacturing method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921999.9A CN112037974B (en) | 2020-09-04 | 2020-09-04 | Composite material reinforced insulated wire and manufacturing method thereof |
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| CN112037974A CN112037974A (en) | 2020-12-04 |
| CN112037974B true CN112037974B (en) | 2021-11-12 |
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| CN109693400A (en) * | 2018-12-19 | 2019-04-30 | 浙江联洋新材料股份有限公司 | A kind of preparation method of the flexible yarn of weaving |
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| GB1098704A (en) * | 1963-09-19 | 1968-01-10 | Ass Elect Ind | Improvements relating to electric cables |
| CN102568701B (en) * | 2012-02-09 | 2013-05-01 | 艾庆南 | Production process and equipment for producing 10-35kV power cable by silane crosslinkable polyethylene |
| CN206058926U (en) * | 2016-08-26 | 2017-03-29 | 泰州鼎臣线缆有限公司 | A kind of high tensile power alloy enamel-covered wire |
| CN206849577U (en) * | 2017-06-29 | 2018-01-05 | 东营万洋石油科技有限公司 | A kind of high intensity sound wave logging signal transmission cable |
| US10847283B2 (en) * | 2017-12-21 | 2020-11-24 | Nexans | Top drive service loop cable assembly with heating elements |
| CN208806087U (en) * | 2018-08-31 | 2019-04-30 | 天津正标津达线缆集团有限公司 | A kind of enhanced polyvinyl chloride insulation control cable |
| CN110233001B (en) * | 2019-06-21 | 2020-09-01 | 杭州三元电缆有限公司 | RG-6 copper-clad steel coaxial cable and preparation method thereof |
| CN110232993A (en) * | 2019-06-27 | 2019-09-13 | 联众线缆科技（吉安）有限公司 | A kind of carbon fiber medical treatment line |
| CN210349373U (en) * | 2019-10-18 | 2020-04-17 | 江西汉光电缆股份有限公司 | Light environment-friendly submarine cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202473309U (en) * | 2012-01-11 | 2012-10-03 | 安徽五洲特种电缆集团有限公司 | Environment stress resistant mechanical load resistant environment-friendly type photovoltaic DC cable |
| CN207068499U (en) * | 2017-07-31 | 2018-03-02 | 绵阳保和泰越通信线缆有限公司 | A kind of low smoke and zero halogen grid line |
| CN109693400A (en) * | 2018-12-19 | 2019-04-30 | 浙江联洋新材料股份有限公司 | A kind of preparation method of the flexible yarn of weaving |
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| WO2022048035A1 (en) | 2022-03-10 |
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